MetaMask

Overview

MetaMask is the world’s most widely used self-custodial crypto wallet, developed by ConsenSys — the Ethereum software company founded in 2014 by Ethereum co-founder Joseph Lubin (CoinDesk; MetaMask). Created in 2016 by ConsenSys developers Aaron Davis and Dan Finlay, it began as a browser extension that let ordinary people interact with Ethereum without running a full node (CoinDesk).

MetaMask is self-custodial: the user alone holds the private keys and the 12-word seed phrase that controls the funds (CoinSpeaker). By March 2022, when ConsenSys closed a $450 million round valuing it at $7 billion, MetaMask had passed 30 million monthly active users (CoinDesk). From a Chrome extension it grew into a multichain platform: a mobile app, in-wallet swaps, the Snaps plugin system for non-Ethereum chains, and its own stablecoin (Crypto Briefing; Crypto Daily; MetaMask).

Origins at ConsenSys

ConsenSys consolidated in 2020 into ConsenSys Software Inc., the company that owns MetaMask and the developer platform Infura (CoinDesk). MetaMask was built internally by developers Aaron Davis and Dan Finlay and debuted in 2016 as a Chrome browser extension (CoinDesk).

The origin story is contested: in August 2023, entrepreneur Joel Dietz sued ConsenSys in a San Francisco state court, claiming the wallet’s intellectual property descended from his 2014 in-browser-wallet project “Vapor” — for which he says he hired Davis to write code in 2015, pitched Ethereum figures Vitalik Buterin and Gavin Wood in November 2014, and received a $30,000 Ethereum Foundation grant (CoinDesk). ConsenSys called the claims frivolous, said Dietz “has no relation to MetaMask,” and restated that Davis and Finlay founded it in 2016; no outcome of the suit was found, so the dispute is recorded here unresolved (CoinDesk). In April 2026, co-founder Dan Finlay stepped down from ConsenSys after more than ten years, citing burnout (CoinTelegraph).

How a browser extension became the default gateway to Web3

MetaMask’s decisive innovation was putting the wallet inside the web browser. Before it, using an Ethereum app meant running a full node; the extension let any website request a signature through the user’s own keys, so developers could build dapps around a familiar “connect wallet” click (CoinDesk; Decrypt).

That made MetaMask the standard onramp: Decrypt called it “the primary gateway to the Ethereum blockchain,” and Finlay argued browser-wallets would be “the central piece that will come to define what crypto means to its users” (Decrypt). By 2019 the wallet had 1.3 million users and a million monthly transactions, as Coinbase, Binance and Brave raced to build their own browser-wallets — Decrypt’s second “Browser Wars” (Decrypt). The mobile app followed: public beta on July 22, 2019, full iOS and Android launch in September 2020, with a built-in browser for reaching dapps by URL (Decrypt; CoinSpeaker). In 2020 the code moved from its permissive open-source license to a tiered proprietary license — still inspectable, but commercial forks need an agreement with the company (CoinSpeaker).

Feature	Browser extension	Mobile app
Launched	2016, as a Chrome extension	Public beta July 2019; full launch September 2020
How users reach dapps	Websites request signatures through the wallet inside the browser	Built-in browser; users enter a dapp’s URL
Buying crypto	Not the focus	In-app purchase via Apple Pay, debit cards or other methods
Swaps	October 2020	Added to the mobile app in early 2021
Key model	Self-custodial: user-held 12-word seed phrase	Same self-custodial model

The business model: Swaps and the 0.875% fee

MetaMask is free, but not a charity: in October 2020 it launched Swaps, an aggregator that finds the best price across decentralized exchanges (built with Codefi’s help on the Totle aggregator) and takes a 0.875% service fee on every trade (Crypto Briefing). The math worked — by March 2021 Swaps had processed over $1 billion, one estimate put lifetime swap-fee revenue above $220 million, and the SEC later alleged ConsenSys had collected over $250 million in fees as an unregistered broker (Crypto Briefing; CoinDesk; CoinCentral). A free wallet became a nine-figure revenue business on a sub-1% fee — which is why regulators came knocking (SEC).

The Infura privacy controversy

MetaMask’s second pressure point is its default connection to the blockchain. To read and write to Ethereum, the wallet needs a remote procedure call (RPC) provider, and MetaMask’s default is Infura — another ConsenSys product (CoinDesk). In November 2022, a privacy-policy wording change revealed that Infura collects users’ IP addresses and Ethereum wallet addresses when they transact — sparking outrage, days after Uniswap had made a similar disclosure (CoinDesk).

ConsenSys’s December 2022 response narrowed the practice: wallet and IP data would be collected only on “write” requests — actual transactions — and not on “read” requests like balance checks (CoinDesk). Finlay said the logging dated to 2018 and existed to prevent network overload; ConsenSys would stop logging IPs alongside transaction data to make tracing harder, and promised a settings page letting users choose their own RPC provider at onboarding (CoinDesk).

The SEC case: from charges to dismissal

On June 28, 2024, the SEC charged ConsenSys Software Inc. in Brooklyn federal court (No. 24-civ-04578) with operating as an unregistered broker through MetaMask Swaps and MetaMask Staking since October 2020, and with selling tens of thousands of unregistered securities via staking integrations with Lido and Rocket Pool since January 2023 (SEC). The complaint cited soliciting investors, providing pricing and “best” quotes, routing orders and taking transaction-based compensation, seeking injunctive relief and penalties (SEC).

The case never went to trial: on February 27, 2025, Joseph Lubin announced that the SEC had agreed in principle to dismiss the action, with no fines or conditions and — per ConsenSys general counsel Matt Corva — a dismissal with prejudice, meaning the same claims could not be refiled (CoinCentral). ConsenSys counsel attributed the reversal to the post-election leadership change at the regulator (CoinCentral). Crypto press later in 2026 reported the case closed with no admission of wrongdoing — though outlets disagree on the final closure date (see openItems) (Crypto reNews).

Snaps, mUSD, and the multichain turn

Originally an Ethereum-only wallet, MetaMask spent 2023–2025 breaking that boundary. In September 2023 it launched Snaps in open beta: plugins letting third-party developers extend the wallet to non-EVM blockchains — Bitcoin, Solana, Cosmos, Algorand, Starknet, Sui and Aptos — with more than 30 available at launch (Crypto Daily). In August 2025 came MetaMask USD (mUSD), described as the first stablecoin launched by a self-custodial wallet, issued by Bridge (a Stripe company) and powered by M0, debuting on Ethereum and ConsenSys’s Linea network and spendable via the MetaMask Card at Mastercard merchants (MetaMask). It was framed as a step toward wallet-native finance under the new U.S. stablecoin law, the GENIUS Act (MetaMask).

Frequently asked questions

Who owns MetaMask? MetaMask is developed by ConsenSys, the Ethereum software company founded in 2014 by Ethereum co-founder Joseph Lubin (MetaMask). In 2020 the wallet and Infura moved from the Swiss entity ConsenSys AG to the U.S.-based ConsenSys Software Inc., a transfer that later drew shareholder litigation (CoinDesk).

Does MetaMask collect my IP address? When you use the default Infura connection, yes — ConsenSys says Infura collects your IP address and Ethereum wallet address on transactions (CoinDesk). Since December 2022 collection is limited to transaction (“write”) requests, not balance checks; your own node or a third-party RPC avoids Infura collection entirely (CoinDesk).

Is there a MASK token? No verified token exists. A MetaMask governance-token airdrop “has long been rumored” — CoinDesk was already noting the rumor in 2022 — but the wallet has never issued one (CoinDesk). Any site currently offering MASK tokens should be treated as a scam.

What does “self-custodial” mean in practice? You hold your own private keys via a 12-word seed phrase: MetaMask cannot recover your funds if your device crashes and you lose it, and no support desk can reset it (CoinSpeaker). It also means MetaMask never holds your assets — which is why the SEC’s theory that a wallet interface is a “broker” was so contested (SEC).

What this profile does not claim

• The exact date the SEC’s MetaMask case finally closed is not stated; outlets disagree and the court filing was not read (see openItems).
• Who, beyond Davis and Finlay, contributed to MetaMask’s invention is not resolved; the Dietz lawsuit’s outcome is unknown.
• Current user or download figures are not claimed — 30M+ monthly active users is verified only for March 2022.
• MetaMask is not claimed to be fully private: with the default Infura RPC, transaction metadata is collected, as ConsenSys itself disclosed.
• The dispute between MetaMask’s security lead and Accountable.US over that report’s Lazarus Group finding is not covered here; it belongs to the security lead’s profile and will be cross-linked in the day-15 reconciliation pass.
• No judgment is made on mUSD as an investment; the sources do not support one.